JPS6344705Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a tank structure for a radiator, mainly for automobiles or air conditioning, where the tank body is made of a synthetic resin material that is difficult to bond, such as nylon or polycarbonate. The present invention relates to a tank structure in which the tank body and a metal tube plate can be joined with an adhesive.

[Technical background of the invention and its problems]

For example, an automobile radiator, as shown in FIGS. 1 and 2, constitutes a pair of upper and lower tanks, each consisting of a tank body 2 and a tube plate 1, with a large number of flat tubes 4 passing between them. As shown in FIG. 1, fins 5 are disposed in contact with each other between each tube. Here, the tube plate 1 and the tube are the second
As shown in the figure, there are cases in which they are connected watertight via a packing 6, and cases in which they are directly connected by soldering as shown in Fig. 3.

However, as a recent trend, the material of the tank body 2 is often made of a resin material such as 6.6 nylon or polycarbonate in order to improve the productivity of the heat exchanger or to reduce its weight. The tube plate 1 is made of a metal material such as brass or copper,
The peripheral edge of the tube plate 1 is wrapped around the open end of the tank body 2 via a packing 6 to connect the two. That is, after applying an initial pressing force to the gasket 6, the claw provided on the peripheral edge of the tube plate 1 is bent to lock the tank body 2 and the tube plate 1 together. However, the design of such a tank structure is troublesome because it is important to select the properties, shape, hardness, etc. of the packing 6. Furthermore, when bending the claws on the peripheral edge of the tube plate, a fitting allowance between the gasket and the tank body or an initial pressing force is required, and whether the claws are good or bad affects the watertight performance of the radiator. Therefore, there is a risk that variations in tank performance may occur. In addition, the elastic material such as the packing may deteriorate over time, and the claws of the tube plate 1 may crack, reducing the watertightness between the tank body and the tube plate. Furthermore, such a conventional structure has the disadvantage that it requires a large number of parts and is difficult to assemble. Note that it was not possible to directly bond the tube plate 1 to the tank body 2 itself made of polycarbonate, nylon, or the like. This is because synthetic resin materials such as 6.6 nylon and polycarbonate have excellent heat resistance and strength, and are chemically stable materials, but because they are chemically stable, they cannot be used with adhesives. It lacks intermolecular attraction and its adhesive strength is extremely weak. Furthermore, because the surface is smooth, the so-called rivet-throwing effect of the adhesive is reduced.
Physical adhesion is also weak. As a result, these synthetic resin materials have poor compatibility with adhesives and cannot maintain their adhesive strength.

[Summary of the idea]

Therefore, the present invention provides a tank structure in which the tank body 2 and the tube plate 1 can be firmly joined together using an adhesive.

The tank structure of the present invention relates to a radiator tank structure in which the open end of a tank body 2 made of a poorly adhesive synthetic resin material is connected to the periphery of a metal tube plate 1. Then, the adhesive medium metal body 3 is insert-molded into the open end. At the same time, a part of the surface of the metal body 3 is exposed to the opening end surface. The outer periphery of the opening end including the metal body 3 is formed to protrude in the shape of a small flange. Then, the open end of the tank body 2 is fitted into an annular groove formed on the periphery of the tube plate 1 via an adhesive. Furthermore, the periphery of the groove portion is bent and fastened so that the outer surface of the small flange portion is wrapped around it.

Therefore, according to the present invention, the adhesive medium metal body 3 and the metal tube plate 1 can be firmly bonded using an adhesive. As a result, tank bodies made of materials such as nylon and carbonate, to which conventional adhesives could not be used, can be manufactured simply and quickly. Therefore, it is possible to reduce the number of parts of the radiator tank, provide an inexpensive tank that can be mass-produced, and provide a durable tank. Furthermore, in the present invention, in order to reinforce the adhesive effect, the outer surface of the small flange part of the tank body 2 is wrapped around the groove part of the tube plate 1 by bending the edge of the groove part. and the inner surface of the groove of the tube plate 1, thereby increasing the adhesion effect, increasing the rigidity of the outer periphery of the tube plate due to the bent fastening portion of the tube plate, and increasing the bonding strength against the internal pressure of the tube body. There is.

[Example of idea]

Next, each embodiment of the present invention will be explained based on the drawings.

FIG. 4 is a longitudinal cross-sectional view of the main part of the first embodiment of the present invention, showing the state in which the open end of the tank body 2 and the peripheral edge of the tube plate 1 are joined. In this embodiment, a metal body 3 for adhesive medium is embedded in the open end of the tank body 2 by insert molding. The metal body 3 is made of a thin steel plate, a nonferrous metal plate, or the like, and has an irregular rectangular cross section with an open top end. At the same time, a keyhole-shaped protrusion is formed in the center. Then, this metal body is arranged along the entire circumference of the open end of the tank body 2, and its outer peripheral surface is exposed. Then, the metal body is insert-molded so that the upper end portion and the middle portion thereof are fitted into the open end of the tank body 2. The periphery of the tube plate 1 made of a metal material such as brass is directly wrapped around the outer periphery of the lower end of the tank body 2 thus formed, and an adhesive is interposed between them. This adhesive has pressure resistance, heat resistance, vibration resistance, corrosion resistance,
The optimal material for joining metal materials is selected by considering oil resistance (including coolant resistance), stress resistance (including pulse resistance), and other conditions. Further, an auxiliary caulking plate 7 is attached to the periphery of the tube plate 1 to complete the tank body 2 of the first embodiment. According to this embodiment, the insert member can be constructed by bending the metal plate. Thus, the tank body 2 and the tube plate 1 can be constructed watertight without requiring the packing 6 unlike the conventional synthetic resin tank structure. Next, FIG. 5 is a longitudinal cross-sectional view of a main part showing a second embodiment of the present invention. The metal body 3 for the adhesive medium in this embodiment is manufactured by extrusion molding, die casting molding, etc., and has a cross section that forms part of a rectangular tube, and has a T-shaped protrusion formed in the middle of the tube. be. When such a metal body 3 is continuously formed by extrusion molding, it is formed into a shape that matches the open end of the tank body 2 by an appropriate method. Next, when molding the tank body 2 made of a poorly adhesive synthetic resin material such as 6.6 nylon or polycarbonate, the metal body 3 is insert molded. In the second embodiment shown in FIG. 5, the auxiliary caulking plate 7 shown in FIG. 4 is not used. The peripheral edge of the tube plate 1 is wound around the open end of the tank body 2, and an adhesive is interposed between the two to form a watertight structure. Since this second embodiment does not use the auxiliary caulking plate 7, the number of parts can be further reduced compared to that of the first embodiment, and
Its production becomes easy. In addition, in the present invention, the tank body 2 made of a synthetic resin material and the adhesive medium metal body 3 insert-molded therein can maintain a strong bond relatively easily. The metal body 3 and the metal tube plate 1 can be firmly bonded using a suitable adhesive. Therefore, as a result, a tank structure having pressure resistance etc. can be provided without using the auxiliary caulking plate 7.

Next, FIG. 6 is a longitudinal sectional view of a main part of a third embodiment of the present invention, showing only the open end of the tank body 2. In this embodiment, the adhesive medium metal body 3 insert-molded at the lower end of the tank body 2 is constructed in the shape of a deformed block. According to this third embodiment, deformation of the metal body 3 itself can be prevented.

Next, FIG. 7 is a longitudinal cross-sectional view of a main part showing a fourth embodiment of the present invention, in which the metal body 3 for adhesive medium is made of a metal plate, and it is attached to a part of the outer circumferential surface of the cross section of the open end of the radiator tank. It is folded along the section. A hook portion for biting is formed at the tip. Next, Figure 8 shows the fifth example of the present invention.
This is an embodiment in which a metal body 3 for an adhesive medium is insert-molded over the entire circumference of a wound portion of a tube plate 1.

[Effect of idea]

The tank structure of the present invention relates to a radiator tank structure in which the open end of a tank body 2 made of a synthetic resin material (polycarbonate, nylon), which is difficult to bond with an adhesive, is connected to the periphery of a tube plate 1 made of metal. . Then, the adhesive medium metal body 3 is insert-molded into the open end. At the same time, a part of the surface of the metal body 3 is exposed to the opening end surface. The opening end is bonded to the tube plate 1 using an adhesive through its exposed surface.

The present invention has the above configuration and has the following effects.

(1) In the present invention, a metal body 3 for adhesive medium is insert-molded at the open end of the tank body 2. Therefore, the adhesive medium metal body 3 and the metal tube plate 1 can be firmly joined with the adhesive. As a result, tank bodies made of materials such as nylon and carbonate, to which conventional adhesives could not be used, can be manufactured simply and quickly. Therefore, it is possible to reduce the number of parts of the radiator tank, provide an inexpensive tank that can be mass-produced, and provide a durable tank structure.

(2) Furthermore, in the tank structure of the present invention, only a small amount of the metal body 3 for adhesive medium needs to be insert-molded at the open end of the tank body 2, so that the weight of the radiator tank itself is hardly increased.
This provides a lightweight radiator tank, which has the effect of reducing fuel consumption when used for automobiles.

(3) If the tube plate 1 and the adhesive medium metal body 3 are made of the same metal material, peeling of the adhesive portion due to a difference in coefficient of thermal expansion can be more effectively prevented.

(4) Furthermore, in this invention, in order to reinforce the adhesive effect, the outer surface of the small flange portion of the tank body 2 is bent and fastened so that the outer surface of the small flange portion of the tube plate 1 is wrapped around the groove portion. It is closely held between the body 3 and the inner surface of the groove of the tube plate 1 to enhance the adhesion effect, and the bending and fastening portion of the tube plate increases the rigidity of the outer periphery of the tube plate and increases the bonding strength against the internal pressure of the tube body. There are benefits to be gained.

[Brief explanation of the drawing]

FIG. 1 is an elevational view showing an example of an automobile radiator to which the tank structure of the present invention is applied, and FIG. 2 is a vertical sectional view of section A in FIG. 1, which shows a conventional tank structure. 3 is a longitudinal cross-sectional view showing another conventional tank structure, and FIG. 4 is a longitudinal cross-sectional view of the main part of the tank structure of the present invention. show. FIG. 5 is a vertical cross-sectional view of a main part of the second embodiment, and FIG. 6 is a vertical cross-sectional view of a main part of a third embodiment of the present invention, showing a part of the open end of the tank body 2. FIG. 7 shows the fourth embodiment, and FIG. 8 shows the fifth embodiment. 1...tube plate, 2...tank body,
3...Metal body for adhesive medium, 4...Tube, 5...
...Finn, 6...Punkin, 7...Auxiliary caulking plate.

Claims (1)

[Scope of utility model registration request] In a radiator tank structure in which an open end of a tank body 2 made of a poorly adhesive synthetic resin material is connected to the periphery of a metal tube plate 1, a metal body 3 for an adhesive medium is insert-molded at the open end, and An annular groove formed on the periphery of the tube plate 1, with a part of the surface of the metal body exposed to the outer periphery of the opening end, and including the metal body 3 and projecting from the outer periphery of the opening end in the shape of a small flange. A radiator tank characterized in that the open end of the tank body 2 is fitted through an adhesive, and the edge of the groove is bent and fastened so that the outer surface of the small flange-shaped part is wrapped around it. structure.